Implemented Nil-shortcutting Diamond Spear
Implemented Non-updating Diamond Spear
Implemented Diamond Harpoon and Parallel Diamond Harpoon
bump minor version
add some-<> and some-<>>
Merge commit 'c18730e8ab1a6b61782f8da68975f142162d1ec5'

Merge in commit from @AlexBaranosky pull request (Issue #19).

Conflicts:
	src/swiss_arrows/core.clj
	test/swiss_arrows/test/core.clj